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The Dissolution of Thorium Metal and Thorium Dioxide in HNO3 - HF and HNO3- ( NH4 ) 2 SiF6 Mixtures
Abstract. A satisfactory method has been found for dissolving thorium metal and thorium oxide in heat-treated 25-12 stainless steel vessels without excessive corrosion of the vessels. The dissolution medium consists of strong HNO3 containing a small amount of fluoride or fluo-silicate. the fluoride required has no harmful effects on a subsequent solvent-extraction step for a separation of uranium isotopes from the dissolved thorium.
Date:
August 2, 1946
Creator:
Schuler, Frederick W.; Steahly, Frank L. & Stoughton, Raymond W.
System:
The UNT Digital Library
Theoretical Consideration of the Geometrical Structure of the Uranium Halides
Abstract: The geometrical structure of the uranium halides has been studied from a theoretical viewpoint. This theoretical consideration tends to indicate that the pentavalent uranium halides are geometrically but not energetically capable of existence except as double halide compounds of hexavalent and tetravalent uranium.
Date:
December 2, 1946
Creator:
Calkins, Vincent P.
System:
The UNT Digital Library